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Head studs VS Head bolts???

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Old Mar 28, 2007 | 08:47 AM
  #1  
DA_JDM's Avatar
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From: ottawa, ontario, canada
Default Head studs VS Head bolts???

Stupid but easy answer for you guys because unfortunatly i dont know

Whats the difference between head studs and head bolts???

Thanks
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Old Mar 28, 2007 | 08:51 AM
  #2  
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Default Re: Head studs VS Head bolts??? (DA_JDM)

Head bolts pull the threads up head studs pull the head down
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Old May 14, 2007 | 07:10 PM
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Default Re: Head studs VS Head bolts??? (Natural Aspirations)

If you one of you guys dont mind can i ask which is better? Thanks in advance.
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Old May 14, 2007 | 07:26 PM
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Default Re: Head studs VS Head bolts??? (DA_JDM)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by DA_JDM &raquo;</TD></TR><TR><TD CLASS="quote">Stupid but easy answer for you guys because unfortunatly i dont know

Whats the difference between head studs and head bolts???

Thanks</TD></TR></TABLE>

The purpose of the fastener is to secure the joint (head gasket) this is done by tensioning the bolt/stud to "compress" the gasket between the head and block.

One obtains tension in the bolt/stud by applying a torque to the bolt head or nut (stud). This torque is transferred into tension along the axis of the bolt/stud. The friction factor between the threads of the nut and stud or bolt and threaded block plays a major role in how much of this applied torque is converted into tension. That's why proper lubrication is important. But the difference comes when the bolt is going deeper into the threads of the block and more torque is required to overcome the friction of these additional threads where as the nut on a stud has a "constant" friciton since the threads of the nut are always the same length.

So you could make the general statement that at the same torque value a stud will most likely be in greater tension than the bolt. Hence a stronger joint.
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Old May 14, 2007 | 10:06 PM
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Studs make install easier.
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Old May 14, 2007 | 10:50 PM
  #6  
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Default Re: (Combustion Contraption)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Combustion Contraption &raquo;</TD></TR><TR><TD CLASS="quote">Studs make install easier.</TD></TR></TABLE>
But disassembly more of a pain
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Old May 15, 2007 | 07:47 AM
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yea, tell me about it, you have to pick the head straight up about 6 inches...more of a pain, I can see what you mean....haha
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Old May 15, 2007 | 07:51 AM
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Default Re: (pomansouth01)

And if the head gasket is stuck on one dowel in the head and the other in the block...
Well, it just sucks! Particularly if you are doing it by yourself!
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Old May 15, 2007 | 12:43 PM
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You guys are sissy's.

After i take all the nuts off the head studs, i just flip the car upside down, and the head falls off onto a matress that i have waiting below.
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Old May 15, 2007 | 02:29 PM
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Default Re: (Combustion Contraption)

haha, I do that sometimes!! Works like a charm
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